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Preparation of binary metal electrocatalysts by self-assembly of precursor ionic species on gold and reduction of nitrate ions

Authors
Journal
Journal of Electroanalytical Chemistry
1572-6657
Publisher
Elsevier
Publication Date
Volume
529
Issue
1
Identifiers
DOI: 10.1016/s0022-0728(02)00913-0
Keywords
  • Platinum/Tin Electrocatalyst
  • Quartz Crystal Microbalance
  • Nitrate Reduction

Abstract

Abstract Pt/Sn binary metal electrodes were prepared by the successive adsorption of Sn 2+ and PtCl 6 2− ions onto a gold substrate followed by the reduction of the adsorbed PtCl 6 2−. The atomic ratios of Sn and Pt to the surface Au were determined to be approximately 1 and 0.3, respectively, using a quartz crystal microbalance (QCM), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry. Therefore, binary metal layers at a monolayer level were formed. These Pt/Sn binary metal electrodes exhibited a very high electrocatalytic activity for the reduction of nitrate ions with the predominant formation of ammonium ions.

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